did you probably just share one raid group via 2 LUNs? Then the output
of multipath is imho indeed right. For me it shows the setup you've
described - one raidgroup, shared via 2 LUNs (usually one per default on
SP A, one on SP B, attached via 2 paths per SP to a switch, accessed
from your server via 2 HBAs.
If you have access to the Navisphere cli tool - please post the output of
./navicli -h IP_OF_ONE_OF_YOUR_SPs getlun
I think this will show that my hint is right.
Imho you want to create a second raid group and share it via 2 LUNs, too.